Question

how can you test experimentally to know that there exists space between particals.

Answer 1

In macroscopic cases,you can do a lot of tests like,

1- Take a paper and try to pass it between the gap(if exists it will pass,otherwise not)

2-Put the system in water and if space is there bubble will be formed.

3- Take a thin thread and try the first method.

In microscopic level-

1- Compound Microscopy.

2- You can use friction as a perimeter to know the space too.

Thanks.
Tripathy